Hi, a few weeks ago, when I started to play the game and wanted to run it, I looked at the game page and saw there was no custom theme. Since the game is really gorgeous, it's a shame not to have a cool theme so I tried to do something. Sadly the theme system changed recently so it not possible to get that result anymore but maybe you'll get some ideas from it.
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Custom (the gif ship is a bit too much but it was a good test)
P.S: The game name is Flinthook not FlintHook (with a lower 'h', same for Goldfeathers) đ
Amendment. The site got some theme features brought back so it's possible to get a cool layout again. I made roughly the same changes than for the last time. I hope it'll make you want to improve the theme in one way or another. đ
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Custom (still not sure for the gif ship đ€· )